Quick freezing and cold preserving method for fruits and vegetables

A fruit and vegetable and cold storage technology, which is applied in the direction of fruit and vegetable preservation, freezing/refrigerating preservation of fruits/vegetables, heating preservation of fruits/vegetables, etc. damage and other problems, to achieve the effect of increasing the refrigeration temperature, increasing the glass transition temperature, and good fresh-keeping quality

Inactive Publication Date: 2008-06-11
唐明霞
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing cold storage of fruits and vegetables is prone to problems such as poor taste and flavor of fruits and vegetables, browning of color, decrease of water content and hardness and brittleness, and destruction of nutrient cells. Moreover, the power consumption is large and the cost of refrigeration is high.

Method used

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Embodiment Construction

[0014] A method for quick freezing and cold storage of fruits and vegetables, comprising the following steps:

[0015] (1) Preparation of green solution: 5-10% (example 5%, 8%, 10%) weight of trehalose, 0.5-1% (example 0.5%, 0.8%, 1%) weight of citric acid, 1- The calcium chloride of 2% (1%, 1.5%, 2%) weight is mixed with the water of surplus, is heated to boiling;

[0016] (2) Finishing: Put the cleaned fresh fruits and vegetables into the above-mentioned killing solution, cook at 98-100°C for 2-30 minutes (for example, 2 minutes, 15 minutes, 30 minutes), remove, drain and cool;

[0017] (3) Determination of glass transition temperature: adopt differential scanning calorimeter (DSC) to measure the glass transition temperature of the fruits and vegetables treated through killing green;

[0018] (4) Quick-freezing: freeze the fruits and vegetables within 5-30 minutes (for example, 5 minutes, 15 minutes, 30 minutes) with a freezer until the center temperature is -18°C;

[0019...

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PUM

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Abstract

The invention discloses a quick-freezing refrigeration method for vegetables and fruits, which comprises formulating water-removing liquid, water-removing, detecting the converting temperature of the vitrification, adopting a differential scanning calorimeter to detect converting temperature of the vitrification of vegetables and fruits which are processed by water-removing process, quick-freezing, wearing ice coat for the vegetables and fruit which are processed by quick-freezing process and refrigerating. The invention has good fresh-keeping quality of vegetables and fruits, and reduces refrigerating energy consumption. The water-removing liquid which is used by the invention can improve the converting temperature of the vitrification of vegetables and fruits, improves the refrigerating temperature and reduces the energy consumption of the refrigeration and saves energy by 10-15%, simutanesouly, the inner stability of the vegetables and fruits which are processed by the water-removing process of the invention is strong, which rejects inner chemical changes and biochemistry changes, and the fresh-keeping quality is high.

Description

Technical field: [0001] The invention relates to a quick-freezing and refrigerating method for fruits and vegetables. Background technique: [0002] The existing cold storage of fruits and vegetables is prone to problems such as deterioration of taste and flavor, browning of color, decrease of water content and hardness and brittleness, destruction of nutrient cells, etc., and the consumption of electric energy is large, and the cost of refrigeration is high. Invention content: [0003] The object of the present invention is to provide a quick-freezing and refrigerating method for fruits and vegetables with good fresh-keeping quality and energy saving for refrigerating. [0004] Technical solution of the present invention is: [0005] A quick-freezing and cold storage method for fruits and vegetables is characterized in that it comprises the following steps: [0006] (1) Preparation of green solution: mix 5-10% by weight of trehalose, 0.5-1% by weight of citric acid, 1-2...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): A23B7/00A23B7/154A23B7/005A23B7/04
Inventor袁春新唐明霞邱启程顾拥建郝德荣
Owner唐明霞